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Mirrors > Home > MPE Home > Th. List > funbrfv2b | Structured version Visualization version GIF version |
Description: Function value in terms of a binary relation. (Contributed by Mario Carneiro, 19-Mar-2014.) |
Ref | Expression |
---|---|
funbrfv2b | ⊢ (Fun 𝐹 → (𝐴𝐹𝐵 ↔ (𝐴 ∈ dom 𝐹 ∧ (𝐹‘𝐴) = 𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | funrel 6451 | . . . 4 ⊢ (Fun 𝐹 → Rel 𝐹) | |
2 | releldm 5853 | . . . . 5 ⊢ ((Rel 𝐹 ∧ 𝐴𝐹𝐵) → 𝐴 ∈ dom 𝐹) | |
3 | 2 | ex 413 | . . . 4 ⊢ (Rel 𝐹 → (𝐴𝐹𝐵 → 𝐴 ∈ dom 𝐹)) |
4 | 1, 3 | syl 17 | . . 3 ⊢ (Fun 𝐹 → (𝐴𝐹𝐵 → 𝐴 ∈ dom 𝐹)) |
5 | 4 | pm4.71rd 563 | . 2 ⊢ (Fun 𝐹 → (𝐴𝐹𝐵 ↔ (𝐴 ∈ dom 𝐹 ∧ 𝐴𝐹𝐵))) |
6 | funbrfvb 6824 | . . 3 ⊢ ((Fun 𝐹 ∧ 𝐴 ∈ dom 𝐹) → ((𝐹‘𝐴) = 𝐵 ↔ 𝐴𝐹𝐵)) | |
7 | 6 | pm5.32da 579 | . 2 ⊢ (Fun 𝐹 → ((𝐴 ∈ dom 𝐹 ∧ (𝐹‘𝐴) = 𝐵) ↔ (𝐴 ∈ dom 𝐹 ∧ 𝐴𝐹𝐵))) |
8 | 5, 7 | bitr4d 281 | 1 ⊢ (Fun 𝐹 → (𝐴𝐹𝐵 ↔ (𝐴 ∈ dom 𝐹 ∧ (𝐹‘𝐴) = 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 class class class wbr 5074 dom cdm 5589 Rel wrel 5594 Fun wfun 6427 ‘cfv 6433 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-iota 6391 df-fun 6435 df-fn 6436 df-fv 6441 |
This theorem is referenced by: brtpos2 8048 mpocurryd 8085 xpcomco 8849 fseqenlem2 9781 fpwwe2 10399 joinfval 18091 joinfval2 18092 meetfval 18105 meetfval2 18106 tayl0 25521 ofpreima 31002 funcnvmpt 31004 curf 35755 uncf 35756 curunc 35759 fperdvper 43460 |
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